diff options
| author | Bin Meng | 2016-02-28 23:54:50 -0800 |
|---|---|---|
| committer | Bin Meng | 2016-03-17 10:27:22 +0800 |
| commit | 3cf23719b1dc97d17ed649493b0b61641a79ab1f (patch) | |
| tree | 4fee8e75ea2705b701c58b224ef0fe320aa36023 /arch/x86/lib | |
| parent | 26f9a9b73aeb59150281a10e76567967cfe0611b (diff) | |
x86: Support booting SeaBIOS
SeaBIOS is an open source implementation of a 16-bit x86 BIOS.
It can run in an emulator or natively on x86 hardware with the
use of coreboot. With SeaBIOS's help, we can boot some OSes
that require 16-bit BIOS services like Windows/DOS.
As U-Boot, we have to manually create a table where SeaBIOS gets
system information (eg: E820) from. The table unfortunately has
to follow the coreboot table format as SeaBIOS currently supports
booting as a coreboot payload.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/tables.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c index eccef8ab308..a156f2ce315 100644 --- a/arch/x86/lib/tables.c +++ b/arch/x86/lib/tables.c @@ -10,6 +10,7 @@ #include <asm/smbios.h> #include <asm/tables.h> #include <asm/acpi_table.h> +#include <asm/coreboot_tables.h> /** * Function prototype to write a specific configuration table @@ -67,22 +68,36 @@ void write_tables(void) { u32 rom_table_start = ROM_TABLE_ADDR; u32 rom_table_end; +#ifdef CONFIG_SEABIOS u32 high_table, table_size; + struct memory_area cfg_tables[ARRAY_SIZE(table_write_funcs) + 1]; +#endif int i; for (i = 0; i < ARRAY_SIZE(table_write_funcs); i++) { rom_table_end = table_write_funcs[i](rom_table_start); rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN); +#ifdef CONFIG_SEABIOS table_size = rom_table_end - rom_table_start; high_table = (u32)memalign(ROM_TABLE_ALIGN, table_size); if (high_table) { memset((void *)high_table, 0, table_size); table_write_funcs[i](high_table); + + cfg_tables[i].start = high_table; + cfg_tables[i].size = table_size; } else { printf("%d: no memory for configuration tables\n", i); } +#endif rom_table_start = rom_table_end; } + +#ifdef CONFIG_SEABIOS + /* make sure the last item is zero */ + cfg_tables[i].size = 0; + write_coreboot_table(CB_TABLE_ADDR, cfg_tables); +#endif } |